We can't be certain when this issue started, however we only noticed it yesterday when troubleshooting on a laptop.
Client is Windows 7 Enterprise with the Direct Access Connectivity Assistant (DACA) installed.
Starting from a power off situation we follow the following steps:
* boot laptop on LAN, login, verify everything working, DACA reports "Corporate connectivity is working" (DACA is happy)
* undock laptop and wait for DA to kick in, verify everything working, DACA is happy
* re-dock laptop to LAN, verify everything working, DACA is happy
* undock laptop and wait for DA to kick in, verify everything working, DACA is happy
* re-dock laptop to LAN, verify everything working (i.e. can access internal network, drive shares working) ... and ...
after the 2nd re-dock, DACA reports "Corporate connectivity is NOT working" and despite the fact that everything is actually working, it stubbornly stays that way.
If we shutdown the laptop and restart, it returns to normal behaviour again, until the 2nd re-dock and then the problem repeats.